Felt cleaner for paper-making machines



May 25 1926.

H. E. EURlcH FELT CLEANER FOR PAPER MAKING MACHINES v Filed Nov. 25, 1925 Patented May 25, 1926.

UNITED STATES PATENT oFFicE.

HARRY E. EURICH, DECEASED, LATE OF OTSEGO, MICHIGAN; BY WILLIAM A. MANS- FIELD, ADMINISTRATOR, 0F. OTSEGO,

MICHIGAN, ASSIGNOR TO MAC SIM BAR PAPER CMPANY, 0F OTSEGO, MICHIGAN.

FELT CLEANER FOR PAPER-MAKING MACHINES.

Application led November 25, 1925. Serial No. 71,426.

The main objects of this invention are:

First, to provide an improved felt cleaner for paper making machines which may be left in continuous operation while the inachine is' in operation.

Second, to provide a felt cleaning apparatus for paper 'making machines which acts uniformly from edge to edgeof the felt and with a minimum of wear thereon.

Third, to provide an improved felt cleaning apparatusfor paper making machines which is very simple and economical in structure and may be conveniently installed.

Objects ertaining to details and economies of t e invention will definitely appear from the detailed ldescription to follow. The invention is clearly defined and pointed out in the claims.

A structure embodying the features of the invention is clearly illustrated in the accom anying drawin forming a part of this app ication, in Whic Fig. 1 is a conventional illustration of a paper making machine equippedl withY the improvements. t

Fig. 2 is a.y fragmentaryplan view of the improved paper felt cleaning apparatus.'V

Fig. 3 is an enlarged detail view partially in section on a line corresponding to line 3-3 of Fig. 2.

Fig. 4 is a' fragmentary view partially in section on a line corresponding to line of Fig. 2.

Fig. 5 is a fragmentary elevation. of the suction box portion of this felt cleaning apparatus. l

Referring to the drawing, 1 represents the forming felt of a paper making machine. The driving and supporting rolls are shown conventionally and .without an attempt to show their relation accurately.

The improved felt cleaning apparatus is disposed in operative relation to the return reach 2 of the felt and comprises a cylindrical suction box or pipe 3 having a relatively narrow slot 4 in the top thereof, the outer edges 5v of the slot being rounded substantially as shown. The suction pipe 6 is connected by the branches 7 -to the bottom of the suction box. A pump 8 is conventionally shown in Fig. 5. The return of the felt is carried in sliding contact with theV face of the suction box, see Fig. 4.

The suction box has adjustable internal heads 9 provided with lugs 10 engaging the slots 4 thereby'supporting the heads against rotation. The adjusting screws 11 are rotatably mounted in the ends 12 of the suction box and are provided with finger pieces 13 at their outer ends. This enables the adjustment of the heads to the Width ofthe felt so that the felt may be cleaned for its entire width. v

A spray pipe 14 having a plurality of jet orifices 15 is arranged in advance of and adjacent to the suction box so as to deliver against the outer side of the felt. In practice, however, it is not necessary to operate the spray continuously; in fact that, it has been found very satisfactory to operate the spray only at intervals, for instance, weekly intervals when it is common practice to shut down a machine for general 'cleaning purposes.

The slot 4 is, as stated, relatively narrow, a one-ha1f inch having been found to give very satisfactory results. The full Width of the felt may be covered or the box may be adjusted to the particular Width of sheet being produced. Owing to the cylindrical form of the suction box and the rounding of the edges 5, the apparatus may be left in continuous operation without material wear on the felt; in fact, it is found tol prolong the life of the felt and to enable the production of a very uniform product.-

Further, the excess water is removed from the felt so that a larger percentage of the `water is removed from the sheet in theforming.

and described mainly in conventional forni as it is believed that this will enable those skilled in the art to embody or adapt the same as may be desired.

Having thus described the invention what is claimed as new and desired to secure by Letters Patent is: Y

1. The combination with the forming felt of a paper making machine and its supporting and driving means, of a cylindrical suction box over which the return of the felt is carried in sliding contact having a relatively narrow slot in the face thereof, the outer edges of the slot being rounded, said suction box having a suction connection at the bottoni thereof, a pair of adjustable head meinbers arranged within said suction box and The improvements have been illustrated' provided lwith lugs engaging said slot thereof whereby the heads are supported against rotation, adjusting screws for said heads having threaded engagement therewith rotatably mounted in the ends of the suction box, and a spray pipe having a plurality of jet orifices directed against the outer side of t-he felt adjacent to and in advance of the suction box.

2. The combination with the forming felt of a paper making machine and its supporting and driving means, of a cylindrical suction box over whichrthe return of the felt is carried in sliding contact having a relatively narrow slot in the face thereof, the outerv edges of the slot being rounded, said suction box having a suction connection at the bottom thereof, a pair of adjustable'head inembers arranged within saidy suction box and provided with lugs engaging said slot thereof whereby the heads are supported against rotation, and adjusting screws for said heads having threaded engagement therewith rotatably mounted` in the ends of the suction box. e

3. The combination with the forming felt of a paper making machine and its supporting and driving means, of a cylindrical suction box over which the return of the felt is carriedV in sliding contact having a relatively narrow slot in the face thereof, the outer edges of the slot being rounded, said suctionbox having asuction connection at the bottom thereof, and a spray pipe having a plurality of jet orifices directed against the outer side of the felt adjacent to and i-n advance ofthe suction box.

4. The combination with the forming felt of a paper making machine and its supporting and driving means, of a cylindrical suction box over which the return of the felt is carried in sliding contact having a relatively narrow slot in the face thereof, the outer edges of the slot being rounded, said suction box having a suction connection at the bot- 45 tom thereof.

In witness whereof I have hereunto set my hand.

WILLIAM A. MANSFIELD, A dmz'm'stmtor of Harry E.` urz'ch, Deceased. 

